Window-fastener.



Patented May 8, |900.

innen/fon View@ aftovn Ms mi Nonlgls PETERS a. PHOTn-LITHU.. wA

PATENT Fries.

FRANCIS E. JEWETT, OF ST. LOUIS, MISSOURI.

WINDow-:FAsTrNl-in.

SPECIFICATION forming part of Letters Patent No. 648,962, dated May 8, 1900.

Application tiled October 5 1898. Serial No. 692,714. (No model.)

To atl whom t may concern:

Be it known that I, FRANCIS E. JEWETT, a citizen of the United States, residing at St. Louis, in the State of Missouri, have invented a new and useful Window-Fastener, of which the following is a specification. I,

This invention relates generally to window-fasteners or sash-locks, and more particularly to one in which the lower sash is locked by an appliance carried upon the upper sash.

The object of the invention is to providea fastener of this kind which shall consist of very few parts cheaply and easily constructed and applied and also to provide a fastening which automatically operates when the lower sash is closed.

The invention consists in certain details of construction and novelties of combination, all of which will be fully described hereinafter and afterward particularly pointed out in the appended claim.

In the drawings forming part of this specification, Figure l is a face view of one side of a window, showing the 'application of my invention.` Fig. 2 is a detail perspective view showing the ends of the meeting sashes with my invention as applied and locked. Fig. 3 is a detail sectional view showingthe manner of automatically locking the device. Fig. 4 is a detail perspective view of the locking dog or pawl, and Fig. 5 is a detail view of the blank of the face-plate.

In carrying out my invention I cut a rectangular-shaped recess A in one of thev side stiles of the upper sash, and a face-plate B is attached to the said stile, surrounding the said recess. The face-plate B is made from a blank (shown in Fig. 5) which is just double the length of the face-plate, said blank being folded upon the line b, and the blank is formed with rectangular-shaped openings B', which register with each' other when the blank is folded and are adapted to register with the recess A when the plate is attached to the window-stile. The blank is also provided with holes B2, which register when the blank is folded and provide screw-holes for the attachment of the plate, it being` understood that the outer section of the face-plate has the holes countersunk. The inner section is also formed with transverse grooves 0r corrugations B3, which form bearings for the pivots O', passing through the head of the dog or pawl C, said dog or pawl being curved, as

main portion of the pawl is made to project away from the face of the sash, so that the finger of the operator can be easily inserted behind the pawl to move the foot forward to release the lower sash. It will also cause the center of gravity to pass to the rear of the pivotal point when the' pawl is raised the more readily,and thereby hold the pawl Within the recess without the use of springs or latches of any kind. It will also permit of locating the pivotal point very near the vertical plane of the division between the two sashes, thus requiring but a very shallow recessor cavity for the reception of the pawl. The blank of the face-plate is folded upon itself after the pivots of the locking dog or pawl have been set in place, and the face-plate and dog are then secured to the upper sash, While the ,bearing-plate is secured to the lower sash, as most'clearly shown in Fig. 2. As the pawl, with its pivots and roughened foot, can be cast in one piece, the entire device can be made from only two pieces of material,thereby making it extremely cheap and simple. I/Vhen the lower sash is raised, the dog occupies the position shown in Fig. 3, it being thrown there by hand, and as the lower sash descends in closing the plate D contacts with the head O2 and trips the dog or pawl, so that the foot C3 is brought into contact with the face-plate D, and the window thereby secured. f

Having thus fully described my invention, what I claim as new, and desire to secure by Letters-Patent of the United States, is-

Ina window-sash fastener, the combination with a plate formed from a single piece of flat material folded upon itself and each end slotted longitudinally and perforatedto register with each other, and one portion thereof being provided with a transverse groove, and a curved pawl, one end of which is corrugated and the two fiat sides near the other end are each provided with a laterally-proj ectin g pivot to fit in the groove of the plate, substantially as described.

FRANCIS E. JEWETT. Witnesses:

JNO. B. PACHALL, J. M. KEER.

IOO 

